Improvement in stench-traps



UNITED STATES PATENT OFFICE.

WILLIAM DONOVAN, OF NEW YORK, N. Y.

IMPROVEMENT IN STENCH-TRAPS.

Specification forming part of Letters Patent No. 173,452, dated February15, 1876; application filed January 11, 1876.

To alt whom it may concern Be it known that I, WILLIAM DONOVAN, of thecity, county, and- State of New York, have invented a new and usefulImprovement in Stench-'lraps for waste-pipes of sinks, washbasins, andwater-closets, which improvement is fully set forth in the followingspecification:

The object 'of my invention is-to close the cavity of the waste-pipe,and thus effectually prevent the escape of sewer-gases or vapors intothe adjoining apartments.

My invention consists of threeparts: First, a tube having an elbow ouone end and partially slanting on the other. The inclining end has a rimaround its elliptical orifice, and is provided with threads on and aboveits outward surface, to which it is intended lto screw the third part ofthe invention.

The second part is a valve that is united by a rivet to two lugs nearthe top of slant end of aforesaid tube. `The valve moves with ease andregularity in its operation, and attaches itself so closely to the rimof the aperture it covers that no vapors can escape between them whenthey are properly constructed.

' The third part isa cylindrical tube, threaded internally on one end,which is to be screwedV to the corresponding external threads on the rstpart. It incloses the valve, protects it from injury, and its extremityis inserted into and joined to the Waste-pipe. Or the third part may bedispensed with, if desirable, by connecting the first part to thewaste-pipe in such manneras would not destroy or impede the efficiencyof the valve.

When the elbow is united to bottom of sink, Wasl1-basin, &c., or anytube .proceeding from them, in such manner as would secure for it anupright or somewhat inclined position, the valve comes in close contactwith the rim of the aperture` over which it is placed, and then eflluviaand all noxious .gases are completely excluded.

The valve is automatic or self-acting. When water descends through thewaste-pipe froml sink, 85e., above, it presses against the valve, whichinstantly opens, admits it through, and then suddenly closes, and thuscontinues to act uninterruptedly, thereby obstructing the ascent ofpernicious gases, and preserving the health of the occupants of premiseswhere it is employed.

' The traps already in use for the same purpose are not of much benefitto the community in consequence of the siphon action in them, and thewater they do contain becomes in a short time saturated with themephitic gases from the sewer-pipe, and then it affords no protectionagainst said exhalations.

Figure l is a drawing with cylindrical tube on. Fig. 2 is a drawing withcylindrical tube removed.

A represents the tube to which the valve is connected', B, the slant endof said tube 5 C,

the elbow; D, the threads; E, rim of elliptical aperture; F, the valve;G, rivet; L, lugs; and I, cylindrical tube.

What I claim-as new, and desire to secure by Letters Patent of theUnited States, is, viz:

In combination with the tube A, provided with slant end B, elbow O,threads D, and flat rim E, the automatic valve F, united to lugs neartop of slant end B, and applied to and combined with the rim E, and thecylindrical tube I, provided with the threads D, as and for the purposeset forth and described.

WILLIAM DONOVAN. Witnesses:

WILLIAM TYNAN, WILLIAM HAETNETT.

